PD MEASUREMENT SYSTEM
The new quasi-DC Potential Drop measurement system provides exceptionally low noise DC-like measurements, meaning that inspection current typically of the order of 100mA can be used while still achieving excellent signal to noise ratio. The low power measurements effectively eliminate Joule (or 'Ohmic') heating leading to more stable measurements and simple implementation. The system includes thermocouple readers, auxiliary analogue inputs as well as digital i/o, making it a comprehensive experiment system.
The PD system boasts extremely low noise performance compared to the DC alternative. The performance is achieved using a phase sensitive quasi-DC lock-in technique and specially developed electronics. See our white paper below to find out more.
The excellent noise performance means that highly accurate measurements can be achieved without excessive averaging or measurement power.
The noise performance of the PD system means that measurement current of 10-400mA can be used compared to the 10 Amps+ typically used in DC measurements.
The Joule heating resulting from the measurement current is usually negligible. DC measurements typically use at least 10 Amps, as power is proportional to the current squared then our 100mA measurement produces 10,000 times less heating.
The low power operation means that there is no need for the thick copper cables usually associated with DCPD measurements. This is particularly important in high temperature applications and when the electrical contacts should be non-invasive.
The PD measurement system has a built in thermocouple reader, periphery analogue inputs as well as digital i/o for interfacing with other equipment. It is controlled by USB and our starter software makes it a comprehensive experiment system.